Spawn sh shell

sh.s

	.file	"sh.s"
	.text
	.globl	main
	.type	main, @function

main:
	subl	$32, %esp
	movb 	$0x2f, 16(%esp)
	movb 	$0x62, 17(%esp)
	movb 	$0x69, 18(%esp)
	movb 	$0x6e, 19(%esp)
	movb 	$0x2f, 20(%esp)
	movb 	$0x73, 21(%esp)
	movb 	$0x68, 22(%esp)
	movb 	$0x0, 23(%esp)
	lea 	16(%esp), %edx
	movl	%edx, 24(%esp)
	movl	$0, 28(%esp)
	leal	24(%esp), %ecx
	mov     $0,%edx
	mov     24(%esp),%ebx
	mov     $11,%eax
	int     $0x80

	.size	main, .-main
	.ident	"GCC: (Ubuntu 4.8.2-19ubuntu1) 4.8.2"
	.section	.note.GNU-stack,"",@progbits